| The Star | |||||
|---|---|---|---|---|---|
| Simbad GAIA 2MASS |
HAT-P-27 DR2 1159336403336463872 J14510418+0556505 |
||||
| RA | 14:51:04.1870 | DEC | +05:56:50.548 | ||
| Parallax 4.992 mas |
P.M. RA -28.621 mas/y |
P.M. DEC -2.757 mas/y |
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| MagV 12.19 |
MagR 11.98 |
MagI 11.23 |
MagJ 10.626 |
MagH 10.249 |
MagK 10.109 |
| MagG 11.956 |
MagGBP 12.419 |
MagGRP 11.352 |
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| *Calculated from GAIA magnitudes. | |||||
Ephemeris
- Verified 
|
|||||
|---|---|---|---|---|---|
| Kokori et al. 2025 | |||||
| Mid-time 2457645.03877 ± 0.00014 BJDTDB |
|||||
| Period 3.03957772 ± 2.4e-07 days |
|||||
| Transit Parameters | |||||
| Béky et al. 2011 | |||||
| Rp/Rs 0.119 ± 0.003 |
a/Rs 9.7 +0.12 -0.12 |
i 84.7 +0.4 -0.7 deg |
|||
| e 0.08 +0.05 -0.05 |
ω 63.0 +64.0 -64.0 deg |
||||
| DepthR* 14.08 mmag |
Duration* 1.68 hours |
||||
|
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations. |
|||||
| Limb Darkening Parameters | |||||
| Béky et al. 2011 | |||||
| Teff 5300.0 +90.0 -90.0 K |
Log(g) 4.51 +0.04 -0.04 cm/s2 |
Fe/H 0.29 +0.1 -0.1 dex |
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| ExoClock Status | |||||
|---|---|---|---|---|---|
| Observing Priority | LOW | ||||
| Minimum aperture | 5.94" | ||||
| Total Observations (Recent) | 70 (6) | ||||
| O-C | 0.98 ± 0.48 minutes | ||||
| ExoClock Observations (Recent) | 55 (6) | ||||
| Space Observations (Recent) | 3 (0) | ||||
| ETD Observations (Recent) | 0 (0) | ||||
| Literature Mid-times (Recent) | 12 (0) | ||||
| Kepler Rp/Rs | - | ||||
| TESS Rp/Rs | 0.1154 ± 0.002 | ||||
ExoClock Observations |
||||
| Planet Observation Date |
Observer Observatory |
Telescope Camera / Filter / Exp [s] |
O-C minutes |
|
|---|---|---|---|---|
| HAT-P-27b (LOW) 2026-04-10 | Wilfried Hartmann Observatory Stargate, Austria | Skywatcher 8" f/4 QHY MiniCam8 Mono / R / 30.0 | 1.37 ± 2.74 | |
| HAT-P-27b (LOW) 2026-04-10 | Mark van der Grijp Raspay Observatory | C9.25 HD ZWO2600 MM Pro / R / 120.0 | -1.37 ± 3.02 | |
| HAT-P-27b (LOW) 2026-04-07 | Paolo Arcangelo Matassa P:M.P.H.R. Deep Sky (K81) | Ritchey Chretien 40cm-F5.3 CCD ICX453AQ / Lum / 60.0 | 2.06 ± 1.73 | |
| HAT-P-27b (LOW) 2026-04-07 | Jürgen Schäfer Euskirchen | EDGE HD8 Vetec571C / Clear / 120.0 | -1.25 ± 2.45 | |
| HAT-P-27b (LOW) 2026-04-07 | Adrian Jones Private Observatory (I64) | Meade ACF 30cm QSI 583 / R / 150.0 | -1.54 ± 1.58 | |
| HAT-P-27b (LOW) 2025-05-25 | Paolo Arcangelo Matassa P:M.P.H.R. Deep Sky (K81) | Ritchey Chretien 40cm-F5.3 CCD ICX453AQ / Lum / 60.0 | 0.59 ± 2.16 | |
| HAT-P-27b (LOW) 2025-04-10 | Bryan Martin Tiger Butte Observatory Remote | AG Optical IDK ZWO ASI 294 / R / 180.0 | 2.13 ± 3.02 | |
| HAT-P-27b (LOW) 2025-04-07 | Darryl Madison Ajijic Observatory | Celestron CPC 800 Edge HD ZWO2400MC / Clear / 90.0 | 1.81 ± 2.59 | |
| HAT-P-27b (LOW) 2025-03-20 | Vojtěch Školník Broumov NM Observatory | Meade LX90 ACF MI C2-7000A / Clear / 120.0 | 4.5 ± 2.02 | |
| HAT-P-27b (LOW) 2024-07-25 | Adam Popowicz Otivar dome2 | Newton 12" ASA ASI ZWO 1600MM / V / 77.0 | 4.44 ± 2.88 | |
| HAT-P-27b (LOW) 2024-05-17 | Paolo Arcangelo Matassa P:M.P.H.R. Deep Sky (K81) | Ritchey Chretien 40cm-F5.3 CCD ICX453AQ / Lum / 120.0 | 8.02 ± 3.17 | |
| HAT-P-27b (LOW) 2024-05-10 | Javier Alonso Santiago INAF-OACT | SC Moravian C4 / R / 150.0 | 7.1 ± 4.46 | |
| HAT-P-27b (LOW) 2024-05-10 | Lluis Ribe Les Pedritxes | Celestron Moravian G3 16200 / R / 120.0 | 1.77 ± 1.73 | |
| HAT-P-27b (LOW) 2024-05-07 | Andre Kovacs Moletai Astronomical Observatory (MAO) | 35 cm Maksutov f/3.5 Apogee Alta U47 / R / 120.0 | 1.58 ± 1.11 | |
| HAT-P-27b (LOW) 2024-05-07 | Enrique Arce Vallbona Observatory | Ritchey Chretien ZWO ASI 294 MM PRO / Lum / 300.0 | -0.57 ± 1.87 | |
| HAT-P-27b (LOW) 2024-05-07 | Paolo Arcangelo Matassa P:M.P.H.R. Deep Sky (K81) | Ritchey Chretien 40cm-F5.3 CCD ICX453AQ / Lum / 60.0 | -4.74 ± 2.74 | |
| HAT-P-27b (LOW) 2024-05-04 | Zlatko Orbanić Explorer | Newton Truss 254mm F/3.8 Atik 414 Ex Mono / rpr / 60.0 | 0.98 ± 3.31 | |
| HAT-P-27b (LOW) 2024-04-25 | Alexey Garmash Lyceum 130 | EdgeHD C11 ASI2600MM pro / R / 180.0 | -0.57 ± 1.43 | |
| HAT-P-27b (LOW) 2024-03-23 | Darryl Madison Ajijic Observatory | Celestron CPC 800 Edge HD ZWO2400MC / Clear / 120.0 | 0.25 ± 1.58 | |
| HAT-P-27b (LOW) 2024-03-23 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / Lum / 120.0 | -0.07 ± 0.94 | |
| HAT-P-27b (LOW) 2023-07-15 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / Lum / 120.0 | -3.09 ± 0.91 | |
| HAT-P-27b (LOW) 2023-07-05 | Paolo Arcangelo Matassa P:M.P.H.R. Deep Sky (K81) | Ritchey Chretien 40cm-F5.3 CCD ICX453AQ / Lum / 120.0 | 1.81 ± 2.45 | |
| HAT-P-27b (LOW) 2023-05-09 | Anaël Wünsche El Sauce Observatory | CDK Planewave Chili Moravian G4 16k / Lum / 120.0 | -3.31 ± 1.08 | |
| HAT-P-27b (LOW) 2023-04-30 | David Quiles David Quiles Observatory | Celestron EDGEHD 800 Omegon veTEC 571M / R / 120.0 | 2.11 ± 2.45 | |
| HAT-P-27b (LOW) 2023-04-23 | Tõnis Eenmäe Tartu Observatory | Planewave CDK 12.5 Apogee Alta U42 / R / 90.0 | -1.27 ± 1.44 | |
| HAT-P-27b (LOW) 2022-06-30 | Jean-Pascal Vignes Deep Sky Chile | Planewave CDK400 QHYCCD 600M / Lum / 60.0 | -2.54 ± 0.86 | |
| HAT-P-27b (LOW) 2022-06-20 | Paolo Arcangelo Matassa P:M.P.H.R. Deep Sky (K81) | Ritchey Chretien 40cm-F5.3 CCD ICX453AQ / Lum / 90.0 | -0.91 ± 2.74 | |
| HAT-P-27b (LOW) 2022-06-14 | Stefano Lora MarSEC | Ritchey Chrétien Moravian G2 Mark II / Clear / 120.0 | 3.49 ± 1.3 | |
| HAT-P-27b (LOW) 2022-04-15 | Adam Popowicz Otivar dome2 | Newton 12" ASA ASI ZWO 1600MM / R / 65.0 | 5.59 ± 2.45 | |
| HAT-P-27b (LOW) 2022-04-12 | Paolo Arcangelo Matassa P:M.P.H.R. Deep Sky (K81) | Ritchey Chretien 40cm-F5.3 CCD ICX453AQ / Lum / 120.0 | 1.52 ± 1.87 | |
| HAT-P-27b (LOW) 2022-04-05 | Marc Serrau A77 Dauban | Celestron 11 ST8-XME / Clear / 120.0 | 1.03 ± 1.58 | |
| HAT-P-27b (LOW) 2022-02-16 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / Lum / 120.0 | -1.36 ± 1.01 | |
| HAT-P-27b (LOW) 2022-02-07 | Adrian Jones Private Observatory (I64) | Meade ACF 30cm QSI 583 / R / 150.0 | 0.71 ± 2.02 | |
| HAT-P-27b (LOW) 2021-06-09 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / R / 120.0 | 0.3 ± 1.15 | |
| HAT-P-27b (LOW) 2021-06-02 | Mario Billiani starbase | Unistellar eVscope Sony IMX224 / Clear / 119.09991 | 0.95 ± 5.76 | |
| HAT-P-27b (LOW) 2021-05-24 | Carmelo Falco GAL Hassin Robotic Telescope 2 (GRT2) - Multiband | Giacometti-Fogale RC16 - 2 Andor Apogee Aspen CG16M / gpr / 90.0 | 0.43 ± 2.45 | |
| HAT-P-27b (LOW) 2021-05-24 | Carmelo Falco GALHassin Robotic Telescope 2 (GRT2) | Giacometti-Fogale RC16 Andor Apogee Aspen CG16M / Lum / 60.0 | -1.01 ± 2.88 | |
| HAT-P-27b (LOW) 2021-04-18 | Billy Edwards Haleakala Observatory | LCO Meade SBIG STX6303 / rpr / 59.937 | -0.1 ± 1.3 | |
| HAT-P-27b (LOW) 2021-04-12 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / R / 120.0 | 0.98 ± 1.01 | |
| HAT-P-27b (LOW) 2021-04-09 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / V / 120.0 | 3.83 ± 1.15 | |
| HAT-P-27b (LOW) 2021-03-28 | Marc Deldem Les Barres Observatory | Celestron C11 SBIG ST10-XME / Clear / 120.0 | -1.05 ± 1.01 | |
| HAT-P-27b (LOW) 2021-03-28 | Carmelo Falco GALHassin Robotic Telescope 2 (GRT2) | Giacometti-Fogale RC16 Andor Apogee Aspen CG16M / gpr / 90.0 | -2.2 ± 1.87 | |
| HAT-P-27b (LOW) 2021-03-25 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" SBIG STXL 11002 / Lum / 120.0 | 2.95 ± 1.01 | |
| HAT-P-27b (LOW) 2021-03-25 | Alberto Tomatis Alto-Observatory | RC STL 6303 / Lum / 60.0 | 1.22 ± 2.88 | |
| HAT-P-27b (LOW) 2021-03-25 | Ivo Peretto MarSEC Marana Space Explorer Center | R-C Moravia G2-1600 MkII / Clear / 60.0 | 0.22 ± 2.16 | |
| HAT-P-27b (LOW) 2021-03-25 | Mauro Caló Cavallino | RC SBIG ST10 / Lum / 60.0 | -0.07 ± 4.32 | |
| HAT-P-27b (LOW) 2021-03-25 | Adrian Jones Private Observatory (I64) | Meade ACF 30cm QSI 583 / R / 100.0 | -0.65 ± 2.3 | |
| HAT-P-27b (LOW) 2021-03-15 | Rauno Neito Tartu Observatory | Planewave CDK 12.5 Apogee Alta U42 / R / 60.0 | 0.7 ± 1.44 | |
| HAT-P-27b (LOW) 2020-05-22 | Matthias Mallonn STELLA | Cassegrain optical CCD photometer / rpr / 50.0 | -1.15 ± 0.58 | |
| HAT-P-27b (LOW) 2020-05-19 | Matthias Mallonn STELLA | Cassegrain optical CCD photometer / rpr / 50.0 | 0.4 ± 0.72 | |
| HAT-P-27b (LOW) 2020-05-15 | John Savage Z42 Rushay Farm Observatory | Celestron 14Edge ZWO ASI6200MM / Clear / 120.0 | 1.38 ± 1.15 | |
| HAT-P-27b (LOW) 2020-05-15 | Matthias Mallonn STELLA | Cassegrain optical CCD photometer / rpr / 50.0 | 0.22 ± 0.58 | |
| HAT-P-27b (LOW) 2020-05-15 | Francois Regembal HRTobs | Astrosib RC360 SBIG STX 16803 / Lum / 60.0 | -1.94 ± 2.88 | |
| HAT-P-27b (LOW) 2020-03-07 | Ramon Naves Montcabrer | Meade LX200 12" ACF Moravian G4-9000 / R / 120.0 | 0.93 ± 1.17 | |
| HAT-P-27b (LOW) 2017-05-29 | Alessandro Marchini Astronomical Observatory University of Siena | Mak-Cas 0.3m f/5.6 Sbig STL-6303 / R / 300.0 | 2.34 ± 2.16 | |
Space Observations |
||||
| Planet Observation Date |
Mission | O-C minutes |
||
| HAT-P-27b (LOW) 2022-05-15 | TESS | -1.9 ± 1.08 | ||
| HAT-P-27b (LOW) 2022-05-03 | TESS | 0.55 ± 1.07 | ||
| HAT-P-27b (LOW) 2022-04-30 | TESS | 3.36 ± 1.28 | ||
Literature Mid-times |
||||
| Planet Observation Date |
Reference | O-C minutes |
||
| 2021-04-18 | Edwards et al. 2021 | 0.47 ± 1.87 | ||
| 2018-03-23 | Wang et al. 2021 | 2.17 ± 4.32 | ||
| 2017-03-05 | Wang et al. 2021 | 1.51 ± 1.38 | ||
| 2013-06-03 | Seeliger et al. 2015 | 0.79 ± 0.43 | ||
| 2012-04-25 | Seeliger et al. 2015 | -0.52 ± 1.94 | ||
| 2012-04-01 | Seeliger et al. 2015 | -0.17 ± 3.34 | ||
| 2011-05-21 | Sada et al. 2012 | 0.22 ± 0.56 | ||
| 2011-05-06 | Seeliger et al. 2015 | 0.72 ± 0.73 | ||
| 2011-04-08 | Seeliger et al. 2015 | 0.42 ± 1.67 | ||
| 2011-04-05 | Seeliger et al. 2015 | -2.32 ± 1.54 | ||
| 2010-06-14 | Anderson et al. 2011 | -0.39 ± 0.33 | ||
| 2009-12-20 | Béky et al. 2011 | -1.2 ± 0.78 | ||